The organization was founded in Spain on 24 February 2014 as Gamers2 by former League of Legends pro Carlos "ocelote" Rodríguez Santiago[2] and investor Jens Hilgers.

G2 are also members of the Esports World Cup Foundation Club Support Program, funded by Saudi Arabia's Public Investment Fund, which gives teams monetary rewards for painting the Esports World Cup tournament series in a positive light and driving engagement to the tournament, which is seen to some as a sportswashing tool that Saudi Arabia is using to distract the public from their poor human rights record.

[13] G2 retooled their team for the 2019 season, releasing their bottom lane duo of Hjarnan and Wadid, and signing Mikyx as a new support and acquiring Caps as their new midlaner from their regional rival Fnatic.

[15] G2 became the first team to be crowned LEC champions after they won its inaugural split post name change from EU LCS on 14 April 2019, in a 3–0 sweep against Origen.

[24] G2 revamped its roster for the 2021 LEC season, notably with trading longtime team captain Perkz to Cloud9 and acquiring Martin "Rekkles" Larson from Fnatic.

[25] While G2 finished at the top of the standings after the regular season of the 2021 Spring Split with a 14–4 record,[26] they failed to win in the playoffs, first losing to MAD Lions,[27] and then being eliminated by Rogue in the lower bracket.

[32] G2 finished fourth place in the Spring Split regular season with an 11–7 record and lost to Fnatic in their initial upper bracket playoff match.

[44] There they would lose to T1 in a 5-game series and be sent to the lower bracket.G2 would pick up 3-0 wins against PCSs PSG Talon and LPLs Top Esports before getting 3-0'd by T1 in a rematch to finish 4th place.

[48][49] Soon after G2 announced the additions of Rudy "Skewmond" Semaan from Team BDS Academy and Labros "Labrov" Papoutsakis from BDSs LEC Roster as Jungler and Support respectively.

On 9 April, shortly after placing 9–12th at the MLG Major Championship: Columbus, G2 announced Alexandre "bodyy" Pianaro would be replacing Kévin "Ex6TenZ" Droolans.

[citation needed] On 5 March 2021, G2 benched kennyS, and brought back JaCkz into the active roster following a series of underwhelming results.

G2 continued their strong run of form into IEM Katowice 2023, where they dispatched of NaVi, FaZe, and BIG without dropping a single map to proceed straight to semi finals.

On 7 March 2023, G2 announced an all-female line-up named G2 Oya consisting of Ex-G2 Gozen players zAAz and juliano [83] G2 qualified for Blast.tv Paris Major 2023 as Challengers with a 3-1 record in the RMR.

[97] Two days before the event, on December 11, G2 announced that ex-Virtus.pro player and Major winner Wiktor "TaZ" Wojtas had joined the team as their head coach.

The announcement that G2 Esports acquired the full roster of PENTA Sports, all five players and two coaches came a few days before the kick-off of the Six Major Paris group stage.

Niclas "Pengu" Mouritzen was considered the most experienced player in both the team and the wider Rainbow Six Siege scene, having been in the Year 1 Season 1 PENTA roster.

The team quickly proved to be a beneficial pick-up by G2, winning the Six Major Paris and its $350,000 prize pool immediately following the purchase by defeating their rivals Evil Geniuses 3–0.

After signing Aleksi "UUNO" Työppönen and Joonas "jNSzki" Savolainen retired, G2 lost the Six Major Raleigh on 18 August 2019 after losing 3–1 to Russian rivals, Team Empire.

On 3 March 2020, G2 Esports announced their new "superteam",[120] picking up Ben "CTZN" McMillan from Natus Vincere and Jake "Virtue" Grannan from Fnatic while benching long time player Fabian in the process, who would eventually leave officially on 6 June 2020.

On the same day, G2 introduced two new players: Lucas "Hungry" Reich, coming back from a break from the competitive scene, and Jonas "Jonka" Kaczmarzyk from MnM Gaming.

[125] G2 introduced three new players this time: Karl "Alem4o" Zarth, Kevin "Prano" Pranowitz and Jack "Doki" Robertson while Kayak left for Na'vi.

[126] Only after 6 months joining, Prano moves to the inactive position,[127] Byron "Blurr" Murray is acquired after leaving Na'vi and Fabian rejoins the roster.

G2 Esports first entered the Valorant scene by signing former CS:GO player Oscar "mixwell" Cañellas Colocho as the team's captain on 16 June 2020.

First Strike Europe saw G2 fall in the semi-finals to eventual champions Team Heretics which led to the benching of Davidp and the arrival of Aleksander "zeek" Zygmunt.

These departures saw Žygimantas "nukkye" Chmieliauskas, Auni "AvovA" Chahade and Jose Luis "koldamenta" Aranguren Herrero added to the roster in their place.

[140] In October 2021, G2 announced the organization's first-ever all-female team, led by former CS:GO professional player Julia "Juliano" Kiran, which would compete in Valorant as G2 Gozen.

On 7 January 2019, the team dropped long-standing captain Cameron "Kronovi" Bills, and picked up Reed "Chicago" Wilen from Evil Geniuses.

[175] Following the conclusion of G2: Making the Squad, the top four contestants were offered contracts, with Kevin "Tohaj" Batic later transitioning into a professional player role in January 2020.

The first signing was Sean "Coop" Cooper on 13 October 2020, followed by Kevin "LeTsHe" Fedjuschkin, Zach "smqcked" Ebersole, Jesus "Jelty" Navarez Espinoza and Mack "MackWood" Aesoph to complete the all-new lineup.

[177] Initially fielding Apex Legends streamers, G2 Esports went on to sign an all-Finnish lineup of Sebastian "Mimu" Vesala, Aaro "rette" Hälli and Niko "ZeroNothing" Suominen in September 2019.